spending due to obesity: According to the American Cancer Society, obesity cost an estimated $75 billion in 2003 because of the long and expensive treatment for several of its complications. According to the National Institute of Health, $75-$125 billion is spent on indirect and direct costs due to obesity-related diseases.

poor nations that are net exporters of food to rich nations:
Source: link

StopTheHunger was in the past a website were you could click on a button to donate food paid by sponsors. StopTheHunger has completely changed in recent years and it is NOT a "click to donate" type of site anymore (refer to The Hunger Site instead).